Nasal tanners claim to work by using Melanotan II, a chemical that darkens skin pigmentation. It is illegal to sell medicinal products containing Melanotan II in the UK but since the tanners are sold Peptides for tanning do exist. Melanotan 1 and Melanotan 2 both work at increasing melanin in the skin. Melanotan 1 takes longer to activate. Melnotan 1 is FDA approved. Melanotan 2 does libido, Evolve Tanning Melanotan 2 Injection, Melanotan 2 Starter Kit, Melanotan 2 Australia Melanotan 2. Nasal tan Pharma one Peptides